CVE-2026-77105

Analyzed Analyzed - Analysis Complete

Cryptographic Signature Verification Flaw in CommServe

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Commvault

Description

CommServe contained a cryptographic signature verification issue affecting privilege management. Software customers upgrade to resolved maintenance release. Update CommServe and Web Server.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-09

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-77105

Affected Vendors & Products

Vendor	Product	Version / Range
commvault	commvault	From 11.36.0 (inc) to 11.36.123 (exc)
commvault	commvault	From 11.40.0 (inc) to 11.40.72 (exc)
commvault	commvault	From 11.44.0 (inc) to 11.44.20 (exc)
commvault	commvault	From 11.46.0 (inc) to 11.46.20 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-347	The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Attack-Flow Graph

Executive Summary

This vulnerability is a cryptographic signature verification issue in CommServe that affects privilege management. It allows unauthorized users to potentially gain elevated access by bypassing proper authentication checks due to improper validation of software signatures.

Detection Guidance

Check CommServe version against affected ranges (11.46.0-11.46.19, 11.44.0-11.44.19, 11.40.0-11.40.71, 11.36.0-11.36.122). Verify updates via Command Center under Server listing for Web Server role.

Impact Analysis

An attacker could exploit this flaw to escalate privileges, gaining unauthorized access to sensitive systems or data. This could lead to data breaches, unauthorized modifications, or disruption of services if the attacker gains control over critical functions.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data privacy). Organizations must address this flaw to maintain regulatory compliance and avoid potential fines or legal consequences.

Mitigation Strategies

Upgrade CommServe to patched versions (11.46.20+, 11.44.20+, 11.40.72+, 11.36.123+). Update both CommServe and Web Server components to resolve the cryptographic signature verification flaw.

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